Hong Meigui is an international society dedicated to exploring caves in China. Since January 2001 the society has logged over 1000 cave entrances and mapped over 273 kilometers of cave passage including China's four deepest potholes, China's fourth and fifth longest caves, the longest and deepest conglomerate cave in China, and the second biggest natural underground vertical drop in the world. Today Hong Meigui has over 100 members from 13 countries. For the latest news about ongoing exploration, click here.